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How long does it take for tire to make one complete rotation

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Reference no: EM131131158

A stone gets stuck in the tire of a tractor plowing a field. The following sinusoidal equation models the height of the stone as the tire turns:

 y = 70sin(1.4x + 4.71) + 70

where y represents the height of the stone with respect to the ground (in cm) and x represents the time (in seconds).

  1. How long does it take for the tire to make one complete rotation?
  2. For how many seconds (to 2 decimal places) is the stone at least 120 cm above the ground during the first rotation of the tire?

Reference no: EM131131158

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